Add EventQueue to AppContext

This should alleviate some problems with using the application and
getting the error:

panic: runtime error: slice bounds out of range

However, I'm still able to trigger this event when scrolling
the mouse wheel.

Fixes #47

context/context.go

@@ -4,6 +4,7 @@ import (
 	"log"
 
 	"github.com/gizak/termui"
+	termbox "github.com/nsf/termbox-go"
 
 	"github.com/erroneousboat/slack-term/config"
 	"github.com/erroneousboat/slack-term/service"
@@ -16,11 +17,12 @@ const (
 )
 
 type AppContext struct {
-	Service *service.SlackService
-	Body    *termui.Grid
-	View    *views.View
-	Config  *config.Config
-	Mode    string
+	EventQueue chan termbox.Event
+	Service    *service.SlackService
+	Body       *termui.Grid
+	View       *views.View
+	Config     *config.Config
+	Mode       string
 }
 
 // CreateAppContext creates an application context which can be passed
@@ -39,9 +41,10 @@ func CreateAppContext(flgConfig string) *AppContext {
 	view := views.CreateChatView(svc)
 
 	return &AppContext{
-		Service: svc,
-		View:    view,
-		Config:  config,
-		Mode:    CommandMode,
+		EventQueue: make(chan termbox.Event, 20),
+		Service:    svc,
+		View:       view,
+		Config:     config,
+		Mode:       CommandMode,
 	}
 }

handlers/event.go

@@ -43,17 +43,9 @@ func RegisterEventHandlers(ctx *context.AppContext) {
 }
 
 func anyKeyHandler(ctx *context.AppContext) {
-	eventQueue := make(chan termbox.Event, 5)
-
 	go func() {
 		for {
-			eventQueue <- termbox.PollEvent()
-		}
-	}()
-
-	go func() {
-		for {
-			ev := <-eventQueue
+			ev := <-ctx.EventQueue
 
 			if ev.Type != termbox.EventKey {
 				continue

main.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/erroneousboat/slack-term/context"
 	"github.com/erroneousboat/slack-term/handlers"
+	termbox "github.com/nsf/termbox-go"
 
 	"github.com/gizak/termui"
 )
@@ -87,5 +88,11 @@ func main() {
 	// Register handlers
 	handlers.RegisterEventHandlers(ctx)
 
+	go func() {
+		for {
+			ctx.EventQueue <- termbox.PollEvent()
+		}
+	}()
+
 	termui.Loop()
 }